At least two air bases housing US troops in Iraq were hit by more than a dozen ballistic missiles, the US Department of Defence confirmed.
The Pentagon says at least two sites were attacked, in Irbil and Al Asad.
It is unclear if there have been any casualties.
“We are aware of the reports of attacks on US facilities in Iraq. The president has been briefed and is monitoring the situation closely and consulting with his national security team,” White House spokeswoman Stephanie Grisham said in a statement.
Iranian state TV reported that the attack is a retaliation after the country’s top commander Qasem Soleimani was killed in a drone strike in Baghdad.
“We are warning all American allies, who gave their bases to its terrorist army, that any territory that is the starting point of aggressive acts against Iran will be targeted,” it said via a statement carried by Iran’s state-run IRNA news agency.
Iranian Foreign Minister Javad Zarif later issued a statement on Twitter, claiming the attack was self-defence and denied seeking to escalate the situation into war.
Iran took & concluded proportionate measures in self-defense under Article 51 of UN Charter targeting base from which cowardly armed attack against our citizens & senior officials were launched.
We do not seek escalation or war, but will defend ourselves against any aggression.
— Javad Zarif (@JZarif) January 8, 2020
President Trump tweeted shortly afterwards, insisting “all is well”, while an assessment on damage to life and property was taking place.
All is well! Missiles launched from Iran at two military bases located in Iraq. Assessment of casualties & damages taking place now. So far, so good! We have the most powerful and well equipped military anywhere in the world, by far! I will be making a statement tomorrow morning.
— Donald J. Trump (@realDonaldTrump) January 8, 2020
The attacks took place hours after the burial of Soleimani.
Earlier in the day, President Trump said a US withdrawal of troops from Iraq would be the worst thing for the country. The US has around 5,000 troops in Iraq.